πτωχός, πτωχή, πτωχόν (πτώσσω, to be thoroughly frightened, to cower down or hide oneself for fear; hence, πτωχός properly, one who sLinks and crouches), often involving the idea of roving about in wretchedness (see πένης, at the end; "but it always had a bad sense till it was ennobled in the Gospels; see Matthew 5:3; Luke 6:20, cf. 2 Corinthians 8:9" (Liddell and Scott, under I.)); hence,

3. universally, lacking in anything, with a dative of the respect: τῷπνεύματι, as respects their spirit, i. e. destitute of the wealth of learning and intellectual culture which the schools afford (men of this class most readily gave themselves up to Christ's teaching and proved themselves fitted to lay hold of the heavenly treasure, Matthew 11:25; John 9:39; 1 Corinthians 1:26, 27; (others make the idea more inward and ethical: 'conscious of their spiritual need')), Matthew 5:3; compare with this the Epistle of Barnabas 19 [ET], see ἔσῃἁπλοῦςτῇκαρδίακαίπλούσιοςτῷπνεύματι, abounding in Christian graces and the riches of the divine kingdom. (The Sept. for עָנִי, דַּל, רָשׁ, אֶבְיון, etc.)

Strong's Exhaustive Concordance

beggar, poor.

From ptosso (to crouch); akin to ptoeo and the alternate of pipto); a beggar (as cringing), i.e. Pauper (strictly denoting absolute or public mendicancy, although also used in a qualified or relative sense; whereas penes properly means only straitened circumstances in private), literally (often as noun) or figuratively (distressed) -- beggar(-ly), poor.

Matthew 5:3Adj-NMPGRK:ΜΑΚΑΡΙΟΙ οἱ πτωχοὶ τῷ πνεύματιNAS: Blessed are the poor in spirit,KJV: Blessed [are] the poor in spirit: forINT: Blessed [are] the poor in the spirit

Matthew 11:5Adj-NMPGRK:ἐγείρονται καὶ πτωχοὶ εὐαγγελίζονται NAS: are raised up, and [the] POOR HAVE THE GOSPEL PREACHEDKJV: and the poor have the gospel preached to them.INT: are raised and poor are evangelized

Mark 14:5Adj-DMPGRK:δοθῆναι τοῖς πτωχοῖς καὶ ἐνεβριμῶντοNAS: and [the money] given to the poor. And they were scoldingKJV: have been given to the poor. AndINT: to have been given to the poor And they grumbled

Luke 4:18Adj-DMPGRK:με εὐαγγελίσασθαι πτωχοῖς ἀπέσταλκέν μεNAS: ME TO PREACH THE GOSPEL TO THE POOR. HE HAS SENTKJV: to preach the gospel to the poor; he hath sentINT: me to preach good news to [the] poor he has sent me

Luke 7:22Adj-NMPGRK:νεκροὶ ἐγείρονται πτωχοὶ εὐαγγελίζονται NAS: are raised up, [the] POOR HAVE THE GOSPEL PREACHEDKJV: are raised, to the poor the gospel is preached.INT: dead are raised poor are evangelized